I have tests that need to read. I have tests that need to write. All data written must also be read and verified. You're right, the data is probably cached. If

I have tests that need to read. I have tests that need to write. All data written must also be read and verified. You're right, the data is probably cached. If you need to access a database in your tests you're probably doing it wrong. Build a mock-up of your database accessor API to provide static data, or build a local database dedicated for testing.